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from Symtab import ModuleScope
from PyrexTypes import *
from UtilityCode import CythonUtilityCode
from Errors import error
from Scanning import StringSourceDescriptor
class CythonScope(ModuleScope):
is_cython_builtin = 1
def __init__(self):
ModuleScope.__init__(self, u'cython', None, None)
self.pxd_file_loaded = True
self.populate_cython_scope()
def lookup_type(self, name):
# This function should go away when types are all first-level objects.
type = parse_basic_type(name)
if type:
return type
def find_module(self, module_name, pos):
error("cython.%s is not available" % module_name, pos)
def find_submodule(self, module_name):
entry = self.entries.get(module_name, None)
if entry and entry.as_module:
return entry.as_module
else:
# TODO: fix find_submodule control flow so that we're not
# expected to create a submodule here (to protect CythonScope's
# possible immutability). Hack ourselves out of the situation
# for now.
raise error((StringSourceDescriptor(u"cython", u""), 0, 0),
"cython.%s is not available" % module_name)
def lookup_qualified_name(self, qname):
# ExprNode.as_cython_attribute generates qnames and we untangle it here...
name_path = qname.split(u'.')
scope = self
while len(name_path) > 1:
scope = scope.lookup_here(name_path[0]).as_module
del name_path[0]
if scope is None:
return None
else:
return scope.lookup_here(name_path[0])
def populate_cython_scope(self):
# These are used to optimize isinstance in FinalOptimizePhase
type_object = self.declare_typedef(
'PyTypeObject',
base_type = c_void_type,
pos = None,
cname = 'PyTypeObject')
type_object.is_void = True
type_object_type = type_object.type
self.declare_cfunction(
'PyObject_TypeCheck',
CFuncType(c_bint_type, [CFuncTypeArg("o", py_object_type, None),
CFuncTypeArg("t", c_ptr_type(type_object_type), None)]),
pos = None,
defining = 1,
cname = 'PyObject_TypeCheck')
# self.test_cythonscope()
def test_cythonscope(self):
# A special function just to make it easy to test the scope and
# utility code functionality in isolation. It is available to
# "end-users" but nobody will know it is there anyway...
cython_testscope_utility_code.declare_in_scope(self)
cython_test_extclass_utility_code.declare_in_scope(self)
#
# The view sub-scope
#
self.viewscope = viewscope = ModuleScope(u'cython.view', self, None)
self.declare_module('view', viewscope, None)
viewscope.is_cython_builtin = True
viewscope.pxd_file_loaded = True
cythonview_testscope_utility_code.declare_in_scope(viewscope)
def create_cython_scope(context, create_testscope):
# One could in fact probably make it a singleton,
# but not sure yet whether any code mutates it (which would kill reusing
# it across different contexts)
scope = CythonScope()
if create_testscope:
scope.test_cythonscope()
return scope
cython_testscope_utility_code = CythonUtilityCode(u"""
@cname('__pyx_testscope')
cdef object _testscope(int value):
return "hello from cython scope, value=%d" % value
""")
undecorated_methods_protos = UtilityCode(proto=u"""
/* These methods are undecorated and have therefore no prototype */
static PyObject *__pyx_TestClass_cdef_method(
struct __pyx_TestClass *self, int value);
static PyObject *__pyx_TestClass_cpdef_method(
struct __pyx_TestClass *self, int value, int skip_dispatch);
static PyObject *__pyx_TestClass_def_method(
PyObject *self, PyObject *value);
""")
cython_test_extclass_utility_code = CythonUtilityCode(
name="TestClassUtilityCode",
prefix="__pyx_prefix_TestClass_",
requires=[undecorated_methods_protos],
impl=u"""
@cname('__pyx_TestClass')
cdef class TestClass(object):
cdef public int value
def __init__(self, int value):
self.value = value
def __str__(self):
return 'TestClass(%d)' % self.value
cdef cdef_method(self, int value):
print 'Hello from cdef_method', value
cpdef cpdef_method(self, int value):
print 'Hello from cpdef_method', value
def def_method(self, int value):
print 'Hello from def_method', value
@cname('cdef_cname')
cdef cdef_cname_method(self, int value):
print "Hello from cdef_cname_method", value
@cname('cpdef_cname')
cpdef cpdef_cname_method(self, int value):
print "Hello from cpdef_cname_method", value
@cname('def_cname')
def def_cname_method(self, int value):
print "Hello from def_cname_method", value
@cname('__pyx_TestClass_New')
cdef _testclass_new(int value):
return TestClass(value)
""")
cythonview_testscope_utility_code = CythonUtilityCode(u"""
@cname('__pyx_view_testscope')
cdef object _testscope(int value):
return "hello from cython.view scope, value=%d" % value
""")
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